Welcome to the forum. The picture you posted does not show the serial number. Those are assembly numbers and inspection stamps. The serial number is on the butt of the gun. You may have to remove the grips to see it if it doesnt have the correct factory grips on it
Yeah pics are all important with a value guess. The two pics provide are like trying to price a car based on the hubcap and a taillight photo. They’re cool guns and the people here will not steer you wrong, they’ll give you the best answer they can. Welcome aboard
Welcome to the forums from the Wiregrass! Your 1917 was made in May 1918. I agree with Kevin about valuation. The grips are not original but, frankly, the ones on it are better for shooting. Since this is a pre-WWII N frame, its grip is slightly longer than post war N frames. You might want to keep that in mind if you want to change grips. A good target grip or some rubber Hogues/Pachmayrs are a lot more comfortable on the range.